loop0: detected capacity change from 0 to 32768 bcachefs (loop0): starting version 1.519: (unknown version) opts=metadata_checksum=none,data_checksum=none,checksum_err_retry_nr=0,compression=lz4,nopromote_whole_extents,fsck,norecovery,nojournal_transaction_names,allocator_stuck_timeout=3,version_upgrade=incompatible allowing incompatible features above 0.0: (unknown version) features: lz4,new_siphash,inline_data,new_extent_overwrite,btree_ptr_v2,new_varint,journal_no_flush,alloc_v2,extents_across_btree_nodes bcachefs (loop0): Using encoding defined by superblock: utf8-12.1.0 bcachefs (loop0): invalid bkey in superblock btree=extents level=1: u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 16 min_key 360287970189639680:0:0 durability: 0 (invalid extent entry 000000000001b000) invalid extent entry type (got 12, max 7), deleting bcachefs (loop0): recovering from clean shutdown, journal seq 10 bcachefs (loop0): Version downgrade required: bcachefs (loop0): Version upgrade required: Version upgrade from 0.24: unwritten_extents to 1.519: (unknown version) incomplete Doing incompatible version upgrade from 0.24: unwritten_extents to 1.28: inode_has_case_insensitive running recovery passes: check_allocations,check_alloc_info,check_lrus,check_btree_backpointers,check_backpointers_to_extents,check_extents_to_backpointers,check_alloc_to_lru_refs,bucket_gens_init,check_snapshot_trees,check_snapshots,check_subvols,check_subvol_children,delete_dead_snapshots,check_inodes,check_extents,check_indirect_extents,check_dirents,check_xattrs,check_root,check_unreachable_inodes,check_subvolume_structure,check_directory_structure,check_nlinks,check_rebalance_work,set_fs_needs_rebalance bcachefs (loop0): Now allowing incompatible features up to 1.28: inode_has_case_insensitive, previously allowed up to 0.0: (unknown version) bcachefs (loop0): error reading btree root btree=dirents level=0: btree_node_read_error, fixing bcachefs (loop0): invalid bkey in btree_node btree=alloc level=0: u64s 11 type xattr POS_MIN len 0 ver 0: (type 1): invalid key type for btree alloc (xattr), deleting bcachefs (loop0): error reading btree root btree=alloc level=0: btree_node_read_error, fixing bcachefs (loop0): btree node read error at btree snapshots level 0/0 u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq ebb8d5a9e3463bdb written 16 min_key 0:262144:0 durability: 1 ptr: 0:32:0 gen 0 loop0 node offset 0/16: incorrect min_key: got POS_MIN should be 0:262144:0 flagging btree snapshots lost data running recovery pass reconstruct_snapshots (21), currently at recovery_pass_empty (0) ret btree_node_read_validate_error bcachefs (loop0): error reading btree root btree=snapshots level=0: btree_node_read_error, fixing bcachefs (loop0): error reading btree root btree=freespace level=0: btree_node_read_error, fixing bcachefs (loop0): check_topology... bcachefs (loop0): btree root dirents unreadable, must recover from scan bcachefs (loop0): running recovery pass scan_for_btree_nodes (1), currently at check_topology (2) - rewinding bcachefs (loop0): bch2_check_root(): error restart_recovery bcachefs (loop0): scan_for_btree_nodes... bcachefs (loop0): btree node scan found 7 nodes after overwrites done bcachefs (loop0): check_topology... bcachefs (loop0): btree root dirents unreadable, must recover from scan bcachefs (loop0): bch2_get_scanned_nodes(): recovery btree=dirents level=0 POS_MIN - SPOS_MAX bcachefs (loop0): bch2_get_scanned_nodes(): recovering u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 9aa2895aefce4bdf written 24 min_key POS_MIN durability: 1 ptr: 0:41:0 gen 0 bcachefs (loop0): empty interior btree node at btree=dirents level=1 u64s 5 type btree_ptr SPOS_MAX len 0 ver 0, fixing bcachefs (loop0): bch2_btree_repair_topology_recurse(): error ECHILD bcachefs (loop0): empty btree root dirents bcachefs (loop0): btree root snapshots unreadable, must recover from scan ------------[ cut here ]------------ btree cache cannibalize failed WARNING: CPU: 0 PID: 5351 at fs/bcachefs/btree_cache.c:771 btree_node_cannibalize fs/bcachefs/btree_cache.c:771 [inline] WARNING: CPU: 0 PID: 5351 at fs/bcachefs/btree_cache.c:771 bch2_btree_node_mem_alloc+0x1015/0x1820 fs/bcachefs/btree_cache.c:871 Modules linked in: CPU: 0 UID: 0 PID: 5351 Comm: syz.0.0 Not tainted 6.16.0-rc4-syzkaller-00286-gc435a4f487e8 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:btree_node_cannibalize fs/bcachefs/btree_cache.c:771 [inline] RIP: 0010:bch2_btree_node_mem_alloc+0x1015/0x1820 fs/bcachefs/btree_cache.c:871 Code: d2 e8 8f ca 74 fd 2e 2e 2e 31 c0 e9 a6 fe ff ff e8 c0 ae a2 fd c6 05 4d 27 6e 0b 01 90 48 c7 c7 c0 24 d3 8b e8 3c 57 66 fd 90 <0f> 0b 90 90 eb c3 e8 a0 ae a2 fd eb 05 e8 99 ae a2 fd 49 8d bf b0 RSP: 0018:ffffc9000d4b6d40 EFLAGS: 00010246 RAX: 35dc07f7034c9600 RBX: ffff888059d80000 RCX: 0000000000100000 RDX: ffffc9000f7e1000 RSI: 00000000000fffff RDI: 0000000000100000 RBP: ffff888059d81ce8 R08: ffff88801fc24293 R09: 1ffff11003f84852 R10: dffffc0000000000 R11: ffffed1003f84853 R12: ffff888059cfc800 R13: ffff888059cfca28 R14: ffff888059d81cf0 R15: dffffc0000000000 FS: 00007f3575bd46c0(0000) GS:ffff88808d21c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055558c3af5f8 CR3: 0000000011c4d000 CR4: 0000000000352ef0 Call Trace: bch2_btree_root_alloc_fake_trans+0x141/0xb00 fs/bcachefs/btree_update_interior.c:2655 bch2_check_root fs/bcachefs/btree_gc.c:566 [inline] bch2_check_topology+0x390/0xe00 fs/bcachefs/btree_gc.c:594 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:484 [inline] __bch2_run_recovery_passes+0x395/0x1010 fs/bcachefs/recovery_passes.c:539 bch2_run_recovery_passes+0x184/0x210 fs/bcachefs/recovery_passes.c:610 bch2_fs_recovery+0x2690/0x3a50 fs/bcachefs/recovery.c:1005 bch2_fs_start+0xaaf/0xda0 fs/bcachefs/super.c:1213 bch2_fs_get_tree+0xb39/0x1520 fs/bcachefs/fs.c:2488 vfs_get_tree+0x92/0x2b0 fs/super.c:1804 do_new_mount+0x24a/0xa40 fs/namespace.c:3902 do_mount fs/namespace.c:4239 [inline] __do_sys_mount fs/namespace.c:4450 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4427 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f35797900ca Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3575bd3e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f3575bd3ef0 RCX: 00007f35797900ca RDX: 00002000000000c0 RSI: 0000200000000100 RDI: 00007f3575bd3eb0 RBP: 00002000000000c0 R08: 00007f3575bd3ef0 R09: 000000000000001e R10: 000000000000001e R11: 0000000000000246 R12: 0000200000000100 R13: 00007f3575bd3eb0 R14: 0000000000005aa7 R15: 00002000000001c0